The invention discloses a convenient-to-
mount efficient drainage device for a bridge
expansion joint. The device comprises a vertical plate, wherein a water guide plate is fixedly mounted on the innerside of the vertical plate, a mounting mechanism is connected to the interior of the vertical plate, a mounting rod is arranged in the mounting mechanism, and a threaded block is mounted on the outerwall of the mounting rod in a threaded mode. According to the device, under the action of the mounting mechanism, the vertical plate is closely mounted on the inner wall of the
expansion joint and isfixed through the mounting rod and the threaded block, so that the vertical plate is supported and fixed on the inner wall of the
expansion joint, a cover plate is fixedly connected with the verticalplate through a first
threaded rod, the cover plate reinforces a joint of the vertical plate and the expansion joint at the top, rain
erosion is avoided, an L-shaped plate, a T-shaped plate and the vertical plate are firmly connected under the action of the first
threaded rod and a second
threaded rod, through the arrangement, the device can be rapidly and conveniently installed in the expansionjoint, the connection stability and leakproofness are ensured, and the service life can be prolonged.